Need Motor Swap Help!!

You sure the Tbird is an HO motor? Might double check by looking at the firing order on both engines. Everything from the Fox body engine should swap over just fine to the tbird motor and drop right into your Mustang.
Also- to

It’s a 5.0 HO, but it’s similar to the sn95 94-95 5.0 engine.

The intake is the lower height angled version and the accessories are the shorter sn95 version.

The wiring is incompatible as well. I don’t think you can use the ECU either.

Best option is to break the t bird motor down to long block and swap the wiring, intake, accessories and misc items from the fox onto the motor